Dave's Code

dave.php

<?php

function everyValueDivisibleByFive($array)
{
    $newArray = [];

    if (!count($array)) {
        $result = 'error';
    }
    else {
        foreach ($array as $row) {
            if ($row % 5 != 0) {
                $remainder = $row % 5;

                if (5 - $remainder < 3) {
                    $addition = 5 - $remainder;

                    $newArray[] = $row + $addition;
                }
                else {
                    $newArray[] = $row - $remainder;
                }
            }
            else {
                $newArray[] = $row;
            }
        }

        $result = $newArray;
    }

    return $result;
}
                                       
$result = everyValueDivisibleByFive([1, 7, 12, 18, 23, 34, 45]);

var_dump($result);